Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Surface Plots showing the effect of combined drug treatment on axon density. (a) NGF+FK506 combined dosage. (b) GDNF+FK506 combined dosage. (c) NGF+GDNF combined dosage. Shaded region with dashed lines specifies the concentration range that produced significantly different axonal branching responses when compared with 0 ng/ml, P < 0.05.
